One molecule of a compound weighs 2.50 × 10–22 g. The molar mass of this compound is: a)2.41 g/mol

b) 664 g/mol

c) 143 g/mol

d) 151 g/mol

e) none of these

An experimental procedure requires a 10 ml of acid to be dissolved

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)

Which of the following is a physical property flammability heat of combustion solubility and toxicity